Rifle bolt and sleeve for a receiver having an oval bore



June 29, 1965 G. l. HuRLl-:Y 3,191,331

RIFLE BOLT AND sLEEvE EoR A RECEIVER HAVING AN ovAL BoEE Filed Oct. 25,1962 2 Sheets-Sheet l June 29, 1965 G. l. HURLEY 3,191,331

RIFLE BOLT AND SLEEVE FOR A RECEIVER HAVING AN OVAL BORE Filed Oct. 25.1962 2 Sheets-Sheet 2 United States Patent O 3,191,331 RIFLE BQLT ANDSLEEVE EUR A RECEIVER HAVING AN OVAL EURE Gerald I. Hurley, Groves,Budoni, Nelson & Specker, RG. Box 1598, Grand `Function, Colo. FiledOct. 25, 1962, Ser. No. 233,017 3 Claims. (Cl. 42-16) The presentinvention relates to riile bolts generally and in particular to astraight pull bolt action rifle bolt.

An object of the present invention is to provide a rifle bolt in whichthere `is means for securely locking the bolt in the receiver when theriile is in condition for firing, this means being of sturdy design andconstruction and able to withstand the shock and high back pressure ofheavily loaded cartridges.

Another object of the present invention is to provide a riile bolt inwhich there is a single reciprocating movement of the bolt withoutrotation thereof.

A further object of the present invention is -to provide a rifle boltwhich has a minimum number of parts, one which is readily assembled anddisassembled, one which is sturdy in construction, and one which iseconomically feasible.l

These and other objects and advantages of the present invention will befully apparent from the following description when taken in connectionwith the annexed drawings, in which:

FIGURE 1 is a sectional view of the rifle bolt according to the presentinvention as seen from above,

FIGURE 2 is a View taken on the line 2-2 of FIG- URE 1,

FIGURE 3 is a View taken on the line 3-3 of FIG- URE 2,

FIGURE 4 is a view taken on the line 4-4 of FIG- rURE 2,

FIGURE 5 is a view taken on the line 5-5 of FIG- URE 2,

FIGURE 6 is a view taken on the line 6-6 of FIG- URE 2,

FIGURE 7 is a view similar to FIGURE 1 with the bolt partiallyretracted,

FIGURE 8 is-a view similar to FIGURE 7 with the bolt at the end of theslot but before movement of the head of the bolt out of the receiver,

FIGURE 9 is a sectional view showing the bolt fully retracted,

FIGURE l0 is a sectional View of the bolt sleeve,

FIGURE ll is a view taken on the line 11-11 of FIG- URE 10,

FIGURE 12 is a fragmentary sectional view of one end of the receiver,

FIGURE 13 is a view taken on the line 13-13 of FIG- URE l2,

FIGURE 14 is a sectional View ofthe bolt,

FIGURE 15 is a view taken on the line 15--15 of FIG- URE 14,

FIGURE 16 is a view partly in section of the firing pin, and

FIGURE 17 is a View taken on the line 17-17 of FIG- URE 16.

Referring in greater detail to the drawings in which like numeralsindicate like parts throughout the several views, the reference numeral20 designates a rifle generally having a barrel 22 and a stock portion24, the barrel 22 and the stock portion 24 being only partially shown inFIGURES 1 to 3, inclusive.

The bolt action of the present invention is designated generally by thereference numeral 26 and it includes a receiver 28, a bolt sleeve 30, abolt 32, and an operating handle 34.

The barrel 22 is provided with a bore 36 and the receiver 28 is providedwith a bore 38 in registry with the bore 36. The bore 38 is out of roundand is in fact oval shaped. There is an enlarged portion 40 at one endof the bore 38 in the receiver 28. The bore portion 40 is shapeddifferently than the bore 38 and is substantially circular. The bore 40of the receiver has abutment element 37 where it meets bore 38 as shownin FIGURES l and 8.

The bolt 32 includes a shank 42 and a head 44 on one end of the shank42. The cylindrical bolt shank 42 fits snugly and conformable Within thesleeve 30. The shank 42 is provided with a slot 46 having both endsclosed..

As shown most clearly in FIGURE 14, the slot 46l has a straight portion48 adjacent the head 44 and a curved portion 50 remote from the head 44.A pin 52 traverses the slot 46 and is slidable therein responsive tomovement of the sleeve 30. The traversing pin 52 has its end portionsanchored in the sleeve 30.

The end of the sleeve 31) adjacent the bolt head 44 has two fingers 54projecting therefrom which embrace the sides of the head 44 when thelatter is locked into .the bore portion 40 4by means of the pin 52 when`at the end of the curved portion Si) of slot 46 and the sleeve is allthe way forward. The lingers then serve as a lock in holding the bolthead turned into place against the abutments 37. If the bolt head is notcompletely turned and secured by the abutments, the sleeve ngers andsleeve will not advance suiciently to allow tiring of the piece.

As shown in FIGURE 15, the bolt head 44 has a rim 56 and a lip 58 withinthe rim 56. The bolt head 44 also has a bore 60 in which is seated acoil spring 62 biasing a pin 64 outwardly, as shown in FIGURE 14. Thelip 58 is adapted to engage the rim of a cartridge when in the barrel 22and the pin 64 ejects the cartridge ont of the receiver 28 when the boltis pulled to the rearward position.

The ends of the pin 52 are anchored in holes 66 provided in the sleeve30 as shown in FIGURE 10. The handle 34 is positioned in other holes 66provided in the sleeve 30 and may be shifted for right hand or left handuse by removing from the sleeve 30 and reversing the same.

In FIGURES 16 and 17 the reference numeral 70 designates generally theliring pin of the present invention and is seen to consist in a reducedsection 72 and an enlarged section 74. The enlarged section 74 isprovided with a pair of collars 76 and 78 and the collar 76 bearsagainst the handle 34, there being provided a bore 80 in the handle 34for passage therethrough of the section 74 of the firing pin 70.

The other collar 78 is closed at the end and covers the firing pinsection 74 when the pin is in the bolt 32, as in FIGURE 9. A coil spring82 is interposed between the collar 78 and the handle 34 and biases thetiring pin 70 to the rearward position relative to the bolt 32. The freeend of the reduced tiring pin section 72 is what strikes the base of thecartridge upon actuation of the trigger mechanism, the latter not beingshown.

Pins 84 and 86 secure the collars 76 and 78 to the firing pin section74, respectively.

As shown in FIGURES l2 and 13, the receiver 28 is provided at the endadjacent the barrel 22 with a pair of shoulders 88 and 90 which receive,respectively, the rim of a cartridge (not shown) andthe forward orbattery face of the head 44 of the bolt 32, when the bolt is in theforward position and the cartridge is in the rie barrel.

In action, as shown in FIGURES 1, and 7 to 9, inclusive, when the bolt32 is in the forward position the pin 52 is in the forward end of theslot 46. Upon initiation of a pulling movement to the handle 34, thesleeve moves rearwardly pulling the pin 52 through the straight portion48 of the slot 46 and then into the curved portion of the slot 46. As itmoves into the curved portion it rotates the head 44 disengaging thesides of the head from the abutment formed by the junction of theenlarged portion 40 of the bore 38. Upon rotating a quarter of a turnthe head 44 frees itself and is drawn rearwardly out of the forward endportion of the bore 33 so as to permit extraction of the shell and theejection thereof out of the opening 92 in the receiver 28.

It is to be understood that the bolt action of the present invention isto be employed in combination with any iring mechanism found practicaland the usual magazine may be attached to the receiver in theconventional Way. While only a preferred embodiment of the presentinvention is shown and described, other embodiments are contemplated andnumerous changes and modifications may be made in the invention withoutdeparting from the spirit thereof.

What is claimed is:

1. In a rille including a barrel provided with a bore, a receiver havingan oval bore extending therethrough disposed adjacent one end of saidbarrel with the bore thereof in alignment with the bore of said barrel,a bolt sleeve conformably shaped to lit within said receiver boreslidably mounted in said receiver bore, a bolt slidably mounted in aportion of said sleeve adjacent one end thereof, said bolt having a headon one end and a cylindrical shank conformably shaped to t the interiorof said sleeve, there being a closed ended slot in said shank, said slothaving a straight portion adjacent said head and a curved portion remotefrom said head, said head being conformably shaped to t said receiverbore, a pin traversing said slot and anchored in said sleeve, said boltupon sliding movement of said sleeve in one direction executing aquarter of a turn, said receiver bore having a portion adjacent one endprovided with opposed abutments engageable with said head upon executionof said quarter turn, and a firing pin extending slidably through saidbolt shank from one end to the other and through said bolt head, andthrough said traversing pin.

2. In a ritle including a barrel provided with a bore, a receiver havingan oval bore extending therethrough disposed adjacent one end of saidbarrel with the bore thereof in alignment with the bore of said barrel,a bolt sleeve conformably shaped to fit within said receiver boreslidably mounted in said receiver bore, a bolt slidably Cil mounted in aportion of said sleeve adjacent one end thereof, said bolt having a headon one end and a cylindrical shank conformably shaped to t the interiorof said sleeve, there being a closed ended slot in said shank, said slothaving a straight portion adjacent said head and a curved portion remotefrom said head, said head being conformably shaped to fit said receiverbore, a pin traversing said slot and anchored in said sleeve, said boltupon sliding movement of said sleeve in one direction executing aquarter of a turn, said receiver bore having a portion adjacent one endprovided with opposed abutments engageable with said head upon executionof said quarter turn, a ring pin extending slidably through said boltshank from one end to the other and through said bolt head and throughsaid traversing pin, and a lip on said head adapted to engage the rim ofa cartridge when in said barrel bore.

3. In a rifle including a barrel provided with a bore, a receiver havingan out of round bore extending therethrough disposed adjacent one end ofsaid barrel with the bore thereof in alignment with the bore of saidbarrel, a bolt sleeve conformably shaped to fit within said receiverbore slidably mounted in said receiver bore, a bolt slidably mounted ina portion of said sleeve adjacent one end thereof, said bolt having ahead on one end and a cylindrical shank conformably shaped to fit theinterior of said sleeve, there being a closed ended slot in said shank,said slot having a straight portion adjacent said head and a curvedportion rernote from said head, said head being conformably shaped to tsaid receiver bore, two flat fingers mounted in juxtaposition andintegral with and extending forwardly frorn the forward end of said boltsleeve sliding within the receiver bore and holding the bolt headbetween them when said bolt head is in battery position, a pintraversing said slot and anchored in said sleeve, said bolt upon slidingmovement of said sleeve in one direction executing a quarter of a turn,said receiver bore having a portion adjacent one end provided withopposed abutments engageable with said head upon execution of saidquarter turn, and a firing pin extending slidably through said boltshank from one end to the other end through said bolt head.

References Cited by the Examiner UNITED STATES PATENTS 1,993,887 3/ 35Kewish.

2,424,264 7/ 47 Yorks 42-16 2,648,153 8/53 Dicke 42-16 2,685,754 8/54Crittendon et al. 42-16 2,881,547 4/59 Butler 42-16 2,941,449 `6/60 Reed42-16 BENJAMIN A. BORCHELT, Primary Examiner.

1. IN A RIFLE INCLUDING A BARREL PROVIDED WITH A BORE, A RECEIVER HAVINGAN OVER BORE EXTENDING THERETHROUGH DISPOSED ADJACENT ONE END OF SAIDBARREL WITH THE BORE THEREOF IN ALIGNMENT WITH THE BORE OF SAID BARREL,A BOLT SLEEVE CONFORMABLY SHAPED TO FIT WITHIN SAID RECEIVER BORESLIDABLY MOUNTED IN SAID RECEIVER BORE, A BOLT SLIDABLY MOUNTED IN APORTION OF SAID SLEEVE ADJACENT ONE END THEREOF, SAID BOLT HAVING A HEADON ONE END AND A CYLINDRICAL SHANK CONFORMABLY SHAPED TO FIT THEINTERIOR OF SAID SLEEVE, THERE BEING A CLOSED ENDED SLOT IN SAID SHANK,SAID SLOT HAVING A STRAIGHT PORTION ADJACENT SAID HEAD AND A CURVEDPORTION REMOTE FROM SAID HEAD, SAID HEAD BEING CONFORMABLY SHAPED TO FITSAID RECEIVER BORE, A PIN TRAVERSING SAID SLOT AND ANCHORED IN SAIDSLEEVE, SAID BOLT UPON SLIDING MOVEMENT OF SAID SLEEVE IN ONE DIRECTIONEXECUTING A QUARTER OF A TURN, SAID RECEIVER BORE HAVING A PORTIONADJACENT ONE END PROVIDED WITH OPPOSED ABUTMENTS ENGAGEABLE WITH SAIDHEAD UPON EXECUTION OF SAID QUARTER TURN, AND A FIRING PIN EXTENDINGSLIDABLY THROUGH SAID BOLT SHANK FROM ONE END TO THE OTHER AND THROUGHSAID BOLT HEAD, AND THROUGH SAID TRAVERSING PIN.